中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (12): 68-73.doi: 10.16265/j.cnki.issn1003-3033.2017.12.012

• 安全工程技术科学 • 上一篇    下一篇

煤样中超声波传播特性研究

王云刚1,2,3 副教授, 杨廷廷1,2, 王琼洋1,2, 张宏图1,2, 徐向宇1,2   

  1. 1河南理工大学 瓦斯地质与瓦斯治理国家重点实验室培育基地,河南 焦作 454000
    2河南理工大学 安全科学与工程学院,河南 焦作 454000
    3煤炭安全生产河南省协同创新中心,河南 焦作 454000
  • 收稿日期:2017-09-15 修回日期:2017-11-04 出版日期:2017-12-28 发布日期:2020-10-10
  • 作者简介:王云刚 (1978—),男,山西晋城人,博士,副教授,主要从事瓦斯灾害防治和安全监测理论与技术的科研工作。E-mail:wyg@hpu.edu.cn。
  • 基金资助:
    国家自然科学基金资助(51574112, U1704129);教育部创新团队发展计划项目(IRT_16R22);河南省基础与前沿技术研究计划项目(142300413211);河南省教育厅科技攻关重点项目(14A440011)。

Study on propagation characteristics of ultrasonic wave in coal

WANG Yungang1,2, YANG Tingting1,2, WANG Qiongyang1,2, ZHANG Hongtu1,2, XU Xiangyu1,2   

  1. 1State Key Laboratory Cultivation Base for Gas Geology and Gas control, Henan Polytechnic University, Jiaozuo Henan 454000,China
    2School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454000, China
    3Collaborative Innovation Center of Coal Work Safety, Jiaozuo Henan 454000, China
  • Received:2017-09-15 Revised:2017-11-04 Online:2017-12-28 Published:2020-10-10

摘要: 为更好地预测预报和治理煤岩动力灾害,以河南省义马煤业耿村矿煤样为研究对象,采用超声综合测试仪进行测试试验;并用ANSYS数值模拟方法研究超声波在煤样中的传播特性,重点分析煤样长度对超声波纵波首波幅值的影响。结果表明:同一超声波频率在一定煤样长度范围内,超声波幅值随煤样长度增加呈负指数关系变化,超过一定煤样长度后,超声波幅值无明显变化;超声波频率从20 kHz增加到1 MHz时,超声波可靠检测距离从8.4 m减小到0.252 m。

关键词: 超声波, 传播特性, 检测距离, 首波幅值, 数值模拟

Abstract: In order to predict and control coal and rock dynamic disasters better, coal samples of Gengcun coal mine of Yima coal company in Henan province were studied by using an ultrasonic comprehensive test instrument for testing, and the propagation characteristics of ultrasonic wave in coal samples were studied by ANSYS numerical simulation method. The influence of the length of coal sample on the amplitude of ultrasonic longitudinal wave was examined emphatically. The results show that the amplitude of ultrasonic wave is negatively correlated with the coal sample length, at the same ultrasonic frequency in a certain coal sample length range. But outside the range, the coal sample length has no effect on the ultrasonic wave amplitude, that when the ultrasonic frequency increases from 20 kHz to 1 MHz, the ultrasonic reliable detection distance will be shorted from 8.4 to 0.252 m.

Key words: ultrasonic wave, propagation characteristics, detection distance, first wave amplitude, numerical simulation

中图分类号: